Screen for cinematographic projection.



F. BUTTERWORTH.

SCREEN FOR CINEMATOGRAPHIC PROJECTION.

APPLICATION r1150 MAY 25, 1915.

1,251,961. Patented Jan. 1,1918.

FRANK BUTTERWORTH,

. STAT 1 s PATEN onricn OF LONDON, ENGLAND.

SCREEN FOR CIIiTEMATOG-BAPHIC PROJECTION.

To an whom it may concern:

Be it known that I, FRANK BUmnRwoRTH,

a citizen of United States of America, and

resident of London, England, have invented certain new and useful Improvements in Screens for cinematographic Projection, of which the following is a specification.

This invention relates to improvements in screens for cinematographic projectionand has for its object to provide a screen upon combined. The resulting pulp is rolled into sheets and may be used either'a-lone or may be backed by some suitable fabric or backing. The pulverized or granulated glass is preferably incorporated with the wood pulp throughout a considerable thickness of sur- Specification of Letters Patent.

Patented Jan. 111918.

Application filea-ma 'amam Serial No. 30,365.

' face so that the surface of the screen can be cleaned without impairing its utility for the purpose specified.

p In the accompanying drawingI have illustrated. my invention by a sectional diagram The numeral 1 designates the front surface upon which the granulated glam is applied or embedded and 2 designates a fabric or other backing. I prefer to employ a fabric backing owing to the facility for rolling thereby afforded, but it will be appreciated that other backings may be employed or the backin can in some cases be'dispen'sed with altoget er.

What I claim and desire to secure by Letters Patent is v A screen for projecting purposes comprising a front reflector composed of wood pulp,

and scintillating material intimately mixed is attached.

In testimony whereof I aflix my signature in presence of two witnesses.

p FRANK BUTTERWORTH. Witnesses:

EDWARD A. ELY, VINCENT Huonns.

and a-flexible backing to which the reflector 

